

@mixin upDownCenter($val){
    height: $val;
    line-height: $val;
}

@mixin bgSize($url){
    background-image: url($url);
    width:width($url);
    height: height($url);
    background-size: contain;
    background-repeat: no-repeat;
}
@mixin hoverImage($key){
    @include bgSize($key+'-hover.png');
}

@mixin staticImage($key){
    @include bgSize(($key+'-static.png'))
}